The Nor145 can be used to measure electrical signals from many types of devices and signal
sources without using a microphone. This type of functionality is needed for the verification
of the performance of the analyser according to national and international standards
(like IEC61672-3).
1: Use a Nor1368 kable (BNC - Lemo) instead of the preamp mic combination.
2: Remove mic and use a Nor1447 adapter (BNC). This method resambles the microphone connection.
The sensitivity is not changed due to this. Set it to -26,0 to have one volt rms indicate
120 dB (dBUV).
The specifications are the same for the electrical input as it is for use with a microphone.
If the sensitivity is set to -26.0, the dB values in the specifications can be recalculated
to voltages using the formula:
((dB-120)/20)
V = 10